[KERNEL] Semaphore ICS 1.3.0

This is a kernel based on the pawitp's one and it works for Android 4.0.x ICS ROMs.


Features

- LiveOC
- Custom Voltage
- Voodoo Sound
- BLN
- 373.5MB - 398.7MB available RAM
- Compiled with Linaro 4.7.2
- O3 optimization
- Semaphore Script Manager 0.75
- Auto brightness driver
- Touch Wake
- Vibration intensity
- Deep Idle
- USB host driver
- Governor ondemand (default)
- ondemand: sampling_down_factor tunable by momentum, smooth_ui
- Governor conservative (module, smooth_ui)
- Governor smartassV2 (module, smooth_ui)
- Noop I/O scheduler (default)
- Deadline I/O Scheduler (module)
- Simple I/O Scheduler (module)
- CFQ I/O Scheduler (module)
- Netfilter (iptables) as modules
- CIFS as module
- TUN as module
- Logcat disabled (as module only)
- Standard network packet scheduler
- Kernel log buffer size 4KB (from 128KB)
- Reduced debug info
- TinyRCU
- Fast Charge support
- WiFi PM_MAX when suspend
- CWM 6.0.1.0
- /system/etc/init.d directory creation if not exist

In order to load various modules of the kernel and enable or disable features use HM.Carbide's Semaphore Script Manager application. It automatically copies and runs the respective scripts from /res/scripts to /system/etc/init.d directory. The scripts:

- S05enable_oc_0800 (disable overclocking - caps max freq to 800Mhz)
- S05enable_oc_1000_default (disable overclocking)
- S05enable_oc_1100 (enable overclocking - max freq 1100MHz)
- S05enable_oc_1140 (enable overclocking - max freq 1140MHz)
- S05enable_oc_1200 (enable overclocking - max freq 1200MHz)
- S10enable_gov_conservative (load and enable conservative governor module)
- S10enable_gov_ondemand_default (enable ondemand governor)
- S10enable_gov_smartassV2 (load and enable conservative smartassV2 module)
- S15enable_sched_deadline (load and enable the deadline I/O scheduler module)
- S15enable_sched_noop_default (enable noop scheduler)
- S15enable_sched_sio (enable and load SIO scheduler module)
- S20enable_netfilter (load netfilter modules for firewall or WiFi, USB tethering)
- S30enable_logger (enable logging)
- S35enable_tun (load tun module)
- S40enable_cifs (load cifs module)

Custom Voltage may be configured with Voltage control or similar applications.

For more information check the semaphore kernel website: www.semaphore.gr

For questions or issues about Semaphore Script Manager please visit HM.Carbide thread

Thanks to Superuser, you may download a wonderful custom bootanimation for CM9 from http://www.semaphore.gr/downloads/boot-animations


Thanks to

pawitp for his kernel.
zacharias.maladroit for his useful information about CM's initramfs
HM.Carbide for his Semaphore Script Manager application.
Ezekeel for LiveOC, Custom Voltage
sztupy for USB host driver
koush for CWM
xcaliburinhand for his work about dock support
mialwe for his vibrator intensity and other fixes
ShadowInkDesigns for Android logo
trailblazerz11 for his help with Linaro and other changes
DerTeufel1980 for various hints

All people who support this kernel by testing, reporting issues, donating or simply using it.


Change log

1.3.0 (30/07/2012)
- added CFQ scheduler as module
- in call volume settings (thanks to DerTeufel for his hint)
- fix charging display for car dock (thanks to pawitp)
- CWM 6.0.1.0 (thanks to koush) *
- CWM: added AROMA Filemanager (thanks to amarullz)
- compiled with Linaro 4.7.2 201207

Normal versions (for CM9 or ROMs without hugemem configuration)
1.3.0
- 373.5MB - 385.7MB

For Slim ROM or patched ROMs with hugemem configuration
1.3.0s
- 386.5MB - 398.7MB

* Nandroid backups with CWM 6 are not compatible with previous versions.



1.2.6 (07/07/2012)
- USB mass storage disable write speed cache support (thanks kasper_h, DerTeufel1980 for the hint)
- CWM: Allow key to repeat on hold (thanks to FaultException, koush). Works for volume up, down and touch key menu (as down)
- CWM: fix selection bar color when battery < 21%
- CWM: upstream sync (thanks to koush) *
- initramfs sync some changes with CM9 (adb works in root by default in recovery)
- compiled with linaro 4.7.1 201206

Normal versions (for CM9 or ROMs without hugemem configuration)
1.2.6
- 373.5MB - 385.7MB

For Slim ROM or patched ROMs with hugemem configuration
1.2.6s
- 386.5MB - 398.7MB

* Please note that due to changes in nandroid backup/restore, previous versions of Semaphore can't restore backups from version >= 1.2.6. To be on the safe side, please renew your backups.


1.2.5 (19/06/2012)
- rebased to 3.0.17 (thanks to trailblazerz11 and eugene373 for their github)
- compiled with Linaro 4.7.1 toolchain (thanks to trailblazerz11 for his help)
- O3 optimization flag
- upstream sync (fixes for cdma in-call volume and mic gain included, thanks to pawitp, efpophis)
- WiFi PM_MAX when suspended
- fixed 800MHz underclocking
- changed boot splash screen

Normal versions (for CM9 or ROMs without hugemem configuration)
1.2.5
- 373.5MB - 385.7MB

For Slim ROM or patched ROMs with hugemem configuration
1.2.5s
- 386.5MB - 398.7MB


1.2.2 (01/06/2012)
- Bootloop detection (if no normal boot is detected the phone will be forced to recovery in next boot) *
- bugfix: enabling Wi-Fi hotspot twice (copy the new netfilter script in order this to work by disabling and then enabling again netfilter in Semaphore app)
- creation of /system/lib/modules if does not exist
- removed LMK scripts
- fix some typos in scripts description (thanks to cdmackay, HiKsFiles)

* It doesn't mean that this will necessarily resolve the known bootloop issue, but it may help on bootloops because of bad OC/UV etc.



Full changelog: http://www.semaphore.gr/changelog/ics-version
Deep Idle Guide and FAQ


Sources

The Linux Kernel
Samsung Kernel sources
Semaphore kernel sources


Please use it at your own risk!

The attachment zip files are for flashing from CWM recovery.
The attachment tar files are for flashing through Heimdall/ODIN.

Attachment files md5sum:

4a963c5183993b256c5a0d52f88bc2c7 Semaphore_ICS_1.2.6.zip
408178563587859c31a4c5a90b394166 Semaphore_ICS_1.2.6s.zip
3a0ca16342f811dfd9666ce3633a20b6 Semaphore_ICS_1.2.6.tar
c53114e74530e68c3b5cddb424343e8b Semaphore_ICS_1.2.6s.tar
753748fba3b590babcbfb76857bf609d Semaphore_ICS_1.3.0.zip
a6f0d7c9d2254d9a178248d48cf3de45 Semaphore_ICS_1.3.0s.zip
1e71744541d74fdd60d6b43c2dc767c7 Semaphore_ICS_1.3.0.tar
09e1e9806dc84c9c2e2341e38ebd51b0 Semaphore_ICS_1.3.0s.tar


Alternative download from http://www.semaphore.gr/downloads/gt-i9000-ics

1.2.5e Euro 2012 - Spain Special Edition

Deep Idle Guide and FAQ

This was really unexpected. Unfortunately I can't answer all these questions and comments. So I tried to write a guide and a FAQ for deep idle. Feel free for suggestions and corrections. Source: Samsung's SPV210 RISC Microprocessor User's Manual. Hope it clarifies some things.


Deep Idle Guide and FAQ

When the phone has no actions to perform, because you leave it alone or for example contacts are not synchronizing or gmail application is not fetching a new mail e.t.c., then the best thing that the phone has to do is to go to... sleep (suspend). In this state the phone consumes very little power.

There are also 5 other power schemes that the processor s5pv210 can use to reduce power consumption: Normal, Idle, Deep Idle, Stop and Deep Stop. We are interested in the first three states Normal, Idle and Deep Idle.

In Normal state the CPU is running, that is, some software is running.
In Idle state the CPU core is idle, that is, the CPU core clock is disabled but the remaining parts of s5pv210 are running.
In Deep Idle state the CPU core power is supplied but is powered off by the internal power switch. The remaining parts of processor may become power gated except the Audio power domain for low power MP3 playback.
Samsung in gingerbread kernels used only the Idle scheme. Deep Idle was implemented in the kernel but it was disabled by default. All known GB custom kernels have enabled Deep Idle state.

With stock kernels only Normal, Idle and Sleep states are used. Examples of these states use:

Normal state: User uses browser, or reading emails, watching video etc
Idle state: User listen to music and screen is off, no other software is running.
Sleep state: No user activity, screen is off, no activity of background services and processes.

Kernel checks many times per second different factors and decides which power state to use.
Deep Idle can be used as a better alternative of Idle state and the major benefit is when user listen to music. Then IF and only if all other conditions (factors) are satisfied the kernel decides to go to Deep Idle. That is, as we mentioned, CPU powered off, TOP powered off and L2 cache is powered off. Only Audio is on and that's why we have a major benefit. Another option of Deep Idle is the TOP=ON which means that the TOP module is still powered. This is used when bluetooth is enabled (powered).

Regarding power consumption, Sleep is always the desired state. Below the states ordered by the power they consumes (Normal consumes more power):

Normal -> Idle -> Deep Idle (TOP=ON) -> Deep Idle (TOP=OFF) -> Sleep


FAQ

How to enable Deep Idle?
a) Simply check the Deep Idle option in Semaphore Script Manager or b) use this command on a terminal emulator or adb shell:
echo 1 > /sys/devices/virtual/misc/deepidle/enabled

How to enable Deep Idle Statistics?
a) Simply check the Deep Idle Statistics option in Semaphore Script Manager or b) use this command on a terminal emulator or adb shell:
echo 1 > /sys/devices/virtual/misc/deepidle/stats_enabled

Why statistics are not enabled by default?
Simply for saving CPU cycles. Kernel checks for entering Deep Idle (or Idle) many thousand times per minute. So, disabling statistics we have less overhead in CPU. What is the difference? Not to much, but better little than nothing.

What is TOP?
S5PV210 internal modules are grouped into 11 power domains based on their functions. One of these domain is the TOP and it includes these modules: Clock Management Unit (CMU), GPIO(OFF), Bus components, VIC, TZIC, Internal memory (IROM and IRAM), NAND controller, OneNAND controller, CF controller, SRAM controller, Peripheral DMA, Memory DMA, CoreSight, JTAG, Modem interface, Security sub-system, TSI, HSMMC, USB HOST, USB OTG, DRAM controller, CHIPID, IEM_IEC, Security key, SPDIF, PCM, SPI, KEYIF, TSADC, I2C, I2S channel 1 and 2, AC97, PCM, System timer, Watchdog timer, UART.
So, Deep Idle with TOP=OFF power gates all the above modules.

How to check if Deep Idle works?
Enable Deep Idle and Deep Idle statistics then run music player and select your favorite music (it must be your favorite song in order to deep idle work properly). Switch the screen off and wait few seconds (or wait until your favorite song is finished). Check with this command in a terminal emulator or adb shell deep idle statistics:
cat /sys/devices/virtual/misc/deepidle/idle_stats

Alternatively you may just open the idle_stats file in the above directory using a root explorer like application.

I only get TOP=ON statistics
Bluetooth or GPS or Vibrator is running

How to power down Bluetooth?
Use this command:
echo 1 > /sys/devices/platform/bt_rfkill/rfkill/rfkill0/soft
Unfortunately I didn't manage to find a way to enable it again. I tried an rfkil script but it doesn't work for me. If you find a way, please let me know.

I only get Idle statistics (neither TOP=ON nor TOP=OFF)
Something is preventing kernel to enter in deep idle state. This maybe normal. For example:
LCD controller is enabled
USB is connected
TV encoder is working
G3D (GPU) is active
MFC (multi format codec) is active
SDMMC controller is active
etc.

How can I find what is preventing deep idle?
That's why I implemented dflags in deep idle. Kernel check many factors to decide if it can enter deep idle. All these check are encoded in dflags. dflags is an integer number. If you read this number and decode it in binary you will get the results of the last check. Each check is a bit set in binary format. For example:
dflag = 3 binary = 11. This means that LCD controller and camera are active. (Please note that I disabled camera check for preventing kernel entering deep idle). The flags in dflags (most of the are self explanatory):
0 S5PV210_PD_LCD
1 S5PV210_PD_CAM
2 S5PV210_PD_TV
3 S5PV210_PD_MFC
4 S5PV210_PD_G3D
5 SND_S5P_RP
6 S5P_CLKGATE_IP0
7 S5P_CLKGATE_IP1
8 S5P_CLKGATE_IP3
9 loop_sdmmc_check
10 check_usbotg_op
11 check_rtcint
12 check_idmapos

You may enable debugging with
echo 1 > /sys/devices/virtual/misc/deepidle/ddebug_enabled

The you may use this script to get the value of dflags every second.


Leave it to run and try to enter your phone in deep idle. The switch on the screen and read the last values and convert the to binary. Values 0 or 1 lead to deep idle. Other values lead to Idle.

How to build Semaphore kernel

Prerequisites
Basic knowledge of Linux is required to be able to build the kernel. We will also need a modern Linux box (preferably).

Basic Setup
First, we need to setup a directory in which we will clone the kernel and initramfs repositories. In this guide, we will setup them in /tmp but you can do it in any directory you want.

In a terminal we run:


Then we clone the basic kernel repository:

Finally we clone the initramfs repository:

OK, first step done. We got the code. Now we have to do some preparation and compile it.

Configuration
I prefer to use a mini ugly script to compile the kernel and pack it. It's located in the root of the kernel tree (/tmp/semaphore/samsung-kernel-aries/sbuild.sh)

We open this file with an editor of our choice (I prefer vi) and edit:
1) The two lines with the 'make' command, changing the CROSS_COMPILE= option. We need to set the path from the cross compiler toolchain. I use the one that it's included in CM9 repository.
2) The line starting with the 'find' command, changing the kernel source directory and destination directory of the modules location. This is into the initramfs directory. In our example it's /tmp/semaphore/ics-ramdisk/ics_combo/files/modules

The Semaphore's kernel configuration is located in the file config_sema in the root kernel directory. So, we need to copy this file as .config:


Then we run this command to start the Linux kernel configuration utility (again change the CROSS_COMPILE according to your toolchain directory):

We go to 'General Setup' section and we change the 'Initramfs source files' option to /tmp/semaphore/ics-ramdisk/ics_combo/
We also need to change the next 2 options User ID and Group ID to whatever uid and gid we are logged in in the Linux box. In my case is 500,500. We exit and save the configuration.

Compiling
Now we are ready to build the kernel!

We just run:

We wait few minutes (time depends on the machine) and hopefully the compilation will end.

The script will produce 2 files.
1) /tmp/semaphore/samsung-kernel-aries/arch/arm/boot/zImage
2) /tmp/semaphore/ics-ramdisk/cwm/Semaphore_ICS_1.2.0s.zip

These are the 2 known files that we can flash via Heimdal or CWM respectively.

Please accept my apologies

stratosk said:

I'm sorry for your issues.

And I have no more desire to build new versions. At least for now.

Click to expand...

Click to collapse

@all

Please accept my apologies about this comment.

I guess I was very tired trying to prepare the new version, and hearing about these problems and almost no comments about the new stuff make me decide to stop this project.

But, during the day and after reading all these beatiful comments from all of you, I realized that Semaphore is part of my life. It sounds a little bit exceeding saying this but it's true.
For almost a year this project and most of all the communication with all of you is an important part of my life.

And it would be unfair for all of you and for me to kill Semaphore.

@Znida
I'm sorry. My commect was general and I didn't mean to blame you for anything.

@mialwe
Thanks about your comment my friend. It's good to hear that from a person like you.

@bennybaz
Thanks so much trying to help. Beers it's not the issue. As I said I work on Semaphore for year and the $600 is not the reason I still working for this.
Of course it's a huge help for me and many thanks to everybody who donate to me.

@greasyguy
Thanks mate, really appreciated.


@all
Thanks again for your nice comments. You gave me the motivation to start working again. THANK YOU!

Thank you all of you! Your help and your support is awesome!